Terahertz electrodynamics and kinetic inductance of disordered titanium–vanadium alloy thin films

IF 3.8 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2026-10-05 DOI:10.1063/5.0345203

Shekhar Chandra Pandey,Shilpam Sharma,Ashish Khandelwal,M. K. Chattopadhyay

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引用次数: 0

Abstract

Disordered superconductors represent an important area in modern condensed matter physics, where superconductivity survives even in the presence of strong electron scattering and localization effects. Understanding how disorder modifies the high-frequency electrodynamic response is not only important from a physics point of view but also essential for developing next-generation quantum detectors and superconducting devices. In this work, we investigate the terahertz electrodynamics of disordered Ti40V60 alloy thin films using terahertz time-domain spectroscopy to understand the relationship between disorder, quasiparticle dynamics, and kinetic inductance. By analyzing the complex conductivity, penetration depth, and superfluid response, we observe variations in the inductive response under different deposition conditions. Unlike conventional nitride superconductors that require tightly controlled reactive growth conditions, Ti40V60 alloys provide a simpler and more adaptable route for investigating the superconducting parameters under different deposition conditions. These findings demonstrate the THz electrodynamic response of the Ti40V60 alloy thin films and highlight their potential for kinetic inductance detector applications.

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无序钛钒合金薄膜的太赫兹电动力学和动电感

无序超导体是现代凝聚态物理中的一个重要领域，即使存在强电子散射和局域化效应，超导性仍然存在。了解无序如何改变高频电动力学响应不仅从物理学的角度来看很重要，而且对于开发下一代量子探测器和超导器件也至关重要。在这项工作中，我们利用太赫兹时域光谱研究了无序Ti40V60合金薄膜的太赫兹电动力学，以了解无序、准粒子动力学和动力学电感之间的关系。通过分析复合电导率、穿透深度和超流响应，观察了不同沉积条件下感应响应的变化。与需要严格控制反应生长条件的传统氮化物超导体不同，Ti40V60合金为研究不同沉积条件下的超导参数提供了更简单、适应性更强的途径。这些发现证明了Ti40V60合金薄膜的太赫兹电动力学响应，并突出了其在动态电感探测器应用中的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.